package com.caicai.test2;

public class StringDemo {
	public static void main(String[] args) {
		String a="ab";//111
		String s1="a";//22
		String s2="b";//333
		String s3="a"+"b";//
		
		
		String c ="a";
		String d = new String("a");
		
		System.out.println(a==s3);
		
	}
}
